So lately I've been a little obsessed with this app I found called Sing! by Smule. There's many songs on there you can sing to, including anime songs and other international songs. If you pay for the app you get access to more songs and official songs that also allow you to sing with the artist if they opt into pre-record a portion.

It makes singing fun. So fun that I don't care how well or poorly I sing. I just sing for the fun of it, for the collaborations, for the release of stress. :D